1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef A_WAKELOCK_H_
18#define A_WAKELOCK_H_
19
20#include <media/stagefright/foundation/ABase.h>
21#include <powermanager/IPowerManager.h>
22#include <utils/RefBase.h>
23
24namespace android {
25
26class AWakeLock : public RefBase {
27
28public:
29    AWakeLock();
30
31    // NOTE: acquire and release are not thread safe
32
33    // returns true if wakelock was acquired
34    bool acquire();
35    void release(bool force = false);
36
37    virtual ~AWakeLock();
38
39private:
40    sp<IPowerManager> mPowerManager;
41    sp<IBinder>       mWakeLockToken;
42    uint32_t          mWakeLockCount;
43
44    class PMDeathRecipient : public IBinder::DeathRecipient {
45    public:
46        explicit PMDeathRecipient(AWakeLock *wakeLock) : mWakeLock(wakeLock) {}
47        virtual ~PMDeathRecipient() {}
48
49        // IBinder::DeathRecipient
50        virtual void binderDied(const wp<IBinder> &who);
51
52    private:
53        PMDeathRecipient(const PMDeathRecipient&);
54        PMDeathRecipient& operator= (const PMDeathRecipient&);
55
56        AWakeLock *mWakeLock;
57    };
58
59    const sp<PMDeathRecipient> mDeathRecipient;
60
61    void clearPowerManager();
62
63    DISALLOW_EVIL_CONSTRUCTORS(AWakeLock);
64};
65
66}  // namespace android
67
68#endif  // A_WAKELOCK_H_
69